Bridge Demolition Case Study: Upper Structure of the Shinkawajiri Bridge (Old Bridge)

Bridge demolition using blasting. It significantly reduces dangerous tasks such as high-altitude work and the rigging of heavy objects.

A bridge spanning National Route 417 in Ibi River Town, Ibi District, Gifu Prefecture. With the opening of a bypass due to the development of new tunnels and bridges, the Shinkawajiri Bridge (the old bridge), built in 1961, has completed its 60-year service and was dismantled using blasting methods. - Structure: Steel Langer Bridge - Bridge Length: 136.7 m - Width: 5.5 m - Weight: 223 tons On both sides of the bridge, steel components were cut using V-shaped blasting lines and dropped directly onto a work platform created on the riverbed of the Ibi River, facilitating safe mechanical dismantling on the ground. [Features] - Elimination of the need for large-scale scaffolding, leading to reduced construction time and cost savings. - Significant reduction in high-altitude work that poses risks of falling. - Major reduction in hazardous work associated with lifting heavy objects. - No special equipment required due to gravity-based dropping. - The shape after dropping is relatively stable, allowing for smooth subsequent mechanical dismantling. *For more details, please refer to the PDF document or feel free to contact us.*

GunpowderDismantling and moving